. Author manuscript; available in PMC: 2014 May 1.

Published in final edited form as: Contemp Clin Trials. 2013 Mar 16;35(1):117–126. doi: 10.1016/j.cct.2013.03.003

Table 5.

Lifetime prevalence of suicide ideation and attempts.

	Proportion endorsing
Paykel 1: life not worth living	.52
Paykel 2: wished you were dead	.41
Paykel 3: thought of taking own life	.41
Paykel 4: seriously considered/made plans	.26
Paykel 5: attempted suicide	.19
PHQ-9 item 9: current death/suicide ideation	.07
GSIS item 4: I want to end my life	.06
GSIS item 11: At times I think that If things get much worse for me, I will end my life.	.06
GSIS item 12: I have recently been thinking a great deal about specific ways of killing myself.	.04
GSIS item 25: I might do something to end it all if I could only muster the energy to do so.	.02

For Paykel items, responses are yes/no and endorsement reflects a “yes” response. For GSIS items, responses are on a 5-point Likert scale: strongly disagree (1), disagree (2), neither agree nor disagree (3), agree (4), strongly agree (5); for these items endorsement reflects a response of 3 or greater.